2173904 has 20 divisors (see below), whose sum is σ = 4434240. Its totient is φ = 1029600.

The previous prime is 2173903. The next prime is 2173907. The reversal of 2173904 is 4093712.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3272 + ... + 3879.

It is an arithmetic number, because the mean of its divisors is an integer number (221712).

2^2173904 is an apocalyptic number.

It is an amenable number.

2173904 is an abundant number, since it is smaller than the sum of its proper divisors (2260336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2173904 is a wasteful number, since it uses less digits than its factorization.

2173904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7178 (or 7172 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2173904 is about 1474.4164947531. The cubic root of 2173904 is about 129.5428519059.

The spelling of 2173904 in words is "two million, one hundred seventy-three thousand, nine hundred four".